Do kids believe that pigs talk and can build their own homes out of bricks and straw and wood?
No of course not but, as I've already explained, it's the message and the discourse that is important. Not the characters.
Message from The Three Little Pigs? If you invest in time, energy and quality, rather than not, you will better withstand any foe who comes your way. (In a rather inarticulate nutshell.)
And that is good advice whether it's your career, your house, your home, your marriage, your parenting...